For each blank, choose the best answer from the four choices and write down on the answer sheet.(71) is a channel's capacity which directly reflects the data transfer rate of the channel.(72) functions in a NetWare network which is used to define addressing schemes.(73) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.(74) is the popular LAN developed under the direction of the IEEE802.3.(75) is a device which enables digital microcomputers to communicate across analog telephone lines.(71)

A．The volume

B．The bandwidth

C．The noise

D．The delay(72)

A．NetBEUI

B．IP

C．IPX

D．NCP(73)

A．The repeater

B．The hub

C．The bridge

D．The router(74)

A．Token Ring

B．Token Bus

C．Ethernet

D．FDDI(75)

A．The repeater

B．The modem

C．The hub

D．The printer

[单选题]F．or each blank, choose the best answer from the four choices and write down on the answer'sheet.(66)is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group.(67)is an error detection code that most data

[单选题]F．or each blank，choose the best answer from the four choices and write down on the answer sheet．(66) is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group．(67) is an error detection code that most data

[单选题]For each blank，choose the best answer from the four choices and write down on the answer sheet．(66) is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group．(67) is an error detection code that most data

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